
Creating graphic displays 11–37
To supply a tag name, do one of the following:
type a tag name in a Tag Name field or in an Expression field
click the Browse button and select a tag from the list
Using tag placeholders
Tag placeholders provide a way to use one graphic display to represent
a number of similar operations. 4.
For example, imagine you are creating displays for a plant that cans
corn and beans. The machinery used in both processes is identical.
Instead of drawing two displays and specifying corn–related tags in
one display and bean–related tags in another, you can create one
display and not specify any tag names. Where a tag name is required,
type a tag placeholder.
When the display is run, the tag each placeholder represents must be
specified. This can be done in two ways: with a parameter file, or by
specifying the tag names.
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